Bolt-heading machine



(No Model.)

' I 2 Sheets- 8111361: 1. J. R. BLAKESLEE.

BOLT HEADING MACHINE. N0. 364,208.

Patented June '7, 1887.

(No Model.) 2 Shets-Sheet 2. J. R. BLAKESLE-E.

BOLT HEADING MACHINE. No. 364.208. Patented June 7, 1887.

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UNITED STATES PATENT OEFIc JOHN R. BLAKESLEE, OF OUYAHOGA FALLS, OHIO.

BOLT-HEADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 364.208, dated June 7, 1887.

Serial No. 213,095. (No model.)

To aZZ whom it may concern.-

Be it known that I, J OHN R. BLAKESLEE, a citizen of the United States, residing at Ouyahoga Falls, county of Summit, and State of Ohio, have invented certain new and useful Improvements in Bolt-Heading and Upsetting Machines; and I do hereby declare the following to be a description of the same, and

ofthe manner of constructing and using the invention, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it appertains to construct and use the same, reference being had to the accompanying drawings, forming a part of this specification, the principle of the invention leng herein explained and the best mode in whichI have contemplated applying that principle, so as to distinguish it from other in ventions.

This invention relates to'a machine adapted to head bolts, make rivets, upset metal for various purposes, and perform like analogous work.

The controlling object of theinvention is to provide a machine which will have a longlife and will run smooth in operation. To this end I dispense with cam movement and use crank movement, said crank movement, by reason of theincreased wearing-surface,being adapted to last longer in use than a cam movement.

In carrying out my invention I provide a spring device adapted to exert tension upon the movabledieblock, said spring device operating in connection with the actuating parts of said movable die-block, so that after the latter has been moved forward in closed position and has gripped the metal said movable die-block may be maintained under spring tension in said closed position a sufficient length of time to allow the header to operate on the metal and to withdraw therefrom. Such a construction and operation of parts permit the use of a crank movement, for withoutsuch construction and operation it is apparent that the movable die-block would, by the crank movement, be withdrawn from closed position, and would release the metal from its grip before the header could perform its function.

Referring'to the drawings, which represent one form of mechanism for carrying out the principle of my invention, Figure l is a plan view. Fig. 2 is a detail vertical sectional view on line :0 0c of the first figure. Fig. 3 is a detail plan view, with certain parts broken away, ofthe spring device which operatesin conjunction with the movable die-block.

For greater clcarness in the drawings, I have omitted from Fig. 1 thetwo dies and the clamps which hold the latter to their die-blocks. It will therefore be understood that in the complete machine the stationary and the movable die-blocks will be respectively provided with suitable dies.

The driving crank-shaft A has its cranks con nected,respectively,by links B B with the slides G and 0. Slide 0 carries the transverse detachable plate D, which I call the breaker. Said breakerhas its two vertical sideportions engaging with the two bearingposts a, rigid with said slide 0, said posts being located on the rearward face of the breaker, while the front face of said breaker has engagement with the vertical curve bearing 1), rigid on the rear end of link E. Said link E at its rearward portion is further provided with shoulder c, which engages with a crossbar, d, bolted to the forward portion of said slide 0. Said shoulder a is horizontally convex and fits a corresponding concave bearing formed on said bar d. The construction of these parts is such that said link E may have lateral radial movement on said curved bearing of bar d, and also that said breaker D may transmit the forward-moving power to link E, while bar (1- transmits rearward-moving power to said link E. Said breaker D is made of strength sufficient to answer the purpose of thus transmitting forward-moving power to said link E in the normal operation of the machine; but should any accident or mismanagement interfere with the normal forward movement of said link E, so as to endanger the safety of connecting parts, then said breaker D will snap in two under the increased resistance thus put against it as the slide 0 is on its forward movement, and other parts of the machine will be preserved uninjured. A duplicate breaker D may at once be substituted for the broken one, and thus the machine be immediately put again in working condition, said breaker I) being thus made readily de tachable from and attachable to its connecting parts of the machine as described for this purpose.

The forward extremity of link E is pivoted by pivot c to the connecting extremities of the two links F F. Link F is pivoted at its opposite extremity to movable die-block G. Link F is pivoted at its opposite extremity to stop-block H, which latter is pivoted at its forward extremity by pivot f to the stationary body of the machine. The movement of said block is limited in one direction by stop 9 thereon coming in contact with hearing h, formed on the stationary part of the machine, and in its opposite movement by shoulder 1, formed on its forward portion, coming in contact with bearing m, formed rigid with the stationary body of the machine. The side of the block opposite to the pivotal connection of link F is provided with a bearing,.n, against which one extremity of a coil-spring, L, engages, said spring and spring-bearing working in a suitable opening, b, formed in the stationary portion of the machine. A set screw, M, is threaded in said stationary portion of the machine and bears against the extremity of said coilspring opposite to the extremity which engages with the stopblock.

The operation of the machine is substantially as follows: The movable dieblock, with its die, being opened, the metal to be worked on is introduced through opening 1', between said movable die and the die secured to stationary die-block N, the proper introduction ofsaid metal being determined by gage s. The forward stroke of slide 0 thereupon operates through the described connecting mechanism to bring the movable die up into closed position with the stationary die, thereby gripping the working metal. The header P is then carried forward byslide O, operates on the working metal, and commences its return movement. As soon as the header is clear of the working metal the movable die releases the latter, and the foregoing operation may then be repeated. The general outline of the operation being thus shown, I will now describe the office and function of my spring attachment in the accomplishment of said operation.

It will be understood that in Fig. 1 parts are shown with the movable die-blocks in closed position, and with the link E at the exable die-block being also in withdrawn position, and the two links F F forming an ob .tuse angle on the rearward side of the line which connects the three pivotal centers of said links F F when in line with each other.

As the link E makes its forward movement the two links F F are brought into straight line with each other, as shown by the full lines in Fig. 3, the movable die being at this stage of the operation in close face contact with the stationary die. The working metal is now gripped and ready for the header; but the slideE has not up to this time completed its forward movement. It has, however, so far operated upon the toggle-joint that the stop-block H has been swung on its pivot f against the spring L, and compressed the latter, the forward head, 9, of the stop-block coming into contact with hearing 71 as shown in Fig. 3. The link E, in the completion of its forward stroke, then carries the pivot c to the position shown in Fig. 1,'thus placing the two links F F at an angle to each other, as shown in Fig. 1. Spring L thereupon throws the block H into its former position,with shoulder Z against bearing m. The link F then commences its return-stroke, and during this initial return movement it brings the two links F F again into line with each other, and throws the stop-block II with its head 9 against bearing 71, all as shown in Fig. 3. \Vhile the link E has thus been completing the extreme portion of its forward stroke and accomplishing the initial portion of its returnstroke the movable die has been maintained in close contact with the stationary die by the tension of spring L against the swinging stop block and the intermediate connecting parts, said dies thus gripping the working metala Sufficient length of time to allow theheader to make its forward stroke act upon the working metal and clear itself from thelatter in return movement. As thelinkEnow continues its return movement, the movable die is withdrawn and the working metal is released from its grip. It is appar ent that this maintenance of movable diein closed position during a length of time sufficient to allow the header to advance, operate, and withdraw is due to the spring attachment operating in conjunction with the radiallymovable link Eand the toggle-joint, said combination of parts making it possible for the movable dieto be operated by an initial crank movement, in contradistinction to an initial cam movement, of the rotary driving-shaft.

Other forms of embodying and using the principle of my invention may be employed in substitution for the specific form herein shown. It will therefore be understood that omissions, substitutions, and changes may be made as regards the forms and parts herein set forth,

provided the principles of construction embraced in the following claims are retained and employed.

. I therefore particularly point out and distinctly claim as my invention 1. In a bolt-heading and upsetting machine, the combination of a d riving-sh aft carrying two cranks, movable gripping die-bloek G, header 1?, toggle-links F F, adjustable block H, pitman-connection between one driving shaft crank and said header, and pitman-connection between the other driving-shaft crank and said togglelinks, substantially as set forth.

2. In a bolt-heading and upsetting machine, the combination of a crank driving-shaft, a movable gripping die-block, adjustable device H, toggle mechanism between the latter and said gripping die-block, and pitman-connection between said toggle mechanism and crank: shaft, substantially as set forth.

3. In a bolt-heading and upsetting machine,

the combination of a crank driving-shaft, a movable gripping die-block, toggle-links F F, spring adjustable device H, and intermediate connection between said toggle-links and said crank-shaft, substantially as set forth.

4. In a bolt-heading and upsetting machine, the combination of a crank driving-shaft, A, toggle-links F F, intermediate connection between said parts, movable grippingdie-block G, and spring-pressed adjustable block H, substantially as set forth.

5. In abolt-heading and upsetting machine, the combination,wit'h a driving-shaft provided with a crank, a movable die-block, and intermediate mechanism, of toggle-jointed arms and a spring-pressed pivotal block, substantially as set forth.

6. In abolt-headiug and upsetting machine, the combination, withadriving-shattprovided with a crank, a movable die-block, and intermediate mechanism, of a pivotal spring-pressed b1ock,and toggle-jointed arms connecting said die-block and said pivotal block, said intermediate crank connecting mechanism being.

' connected to said toggle-joint, substantially as set forth.

7. In a bolt heading and upsetting machine, the combination, with a movable die-block and a spring-pressed pivotal block, of a toggle-joint connecting the two,and a link connectingsaid toggle-joint with a rectilinear reciprocating slide,said link loosely connected with the slide and adapted to have radial swinging movement, substantially as set forth.

8. In a bolt-heading and upsetting machine, the combination, with a movable die-block, a spring-pressed block, and a toggle-joint connecting the two, of a link connecting said toggle-j oint with areciprocating slide,said springpressed block operating to maintain the movable die-block in stationary closed position while said link is making the last portion of its forward stroke and the first portion of its returnstroke, substantially as set forth.

9. In a bolt-heading and upsetting machine, the combination, with a movabie die, a springpressed block, and a toggle'joint connecting the two, of a link connecting said toggle'joint with a reciprocating slide, said spring-pressed block operating to maintain the movable-die in stationary closed position while said link is making the last portion of its forward stroke and the first portion of its return-stroke, said spring pressed block provided with steps which limitits pivotal movement,substantially as set forth.

10. In a bolt-heading and upsetting machine, the combination, with a movable dieblock, G, and a spring-pressed pivotal block, H, of two links, F F, respectively pivoted to said two blocks at their opposite extremities, while the connecting extremities are pivoted to link E, said link E connecting with slide 0, substantially as set forth.

11. In a bolt-heading and upsetting machine, the combination, with a movable block, G, links FFE, and pivotal block 11, of spring L and spring-adj usting device M, substantially as set forth.

i 12. In a bolt-heading and upsetting machine, the combination, with a spring-pressed pivotal block, II, provided with stops g Z, of bearings h m, formed on the stationary portions of the machine, substantially as set forth.

In testimony that I claim the foregoing to be my invention I have hereunto set my hand this 14th day of June, A. D. 1886.

JOHN R. BLAKESLEE.

Witnesses:

T. B. HALL, .WM. HENDEY. 

